Electrical circuit breaker



FIG. 1 is a perspective view of the electrical circuit breaker showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof; and,

FIG. 4 is a top view thereof.

The broken line showing of portions of the circuit breaker represent unclaimed subject matter. 

We claim the ornamental design for an electrical circuit breaker, as shown and described. 